Distininguish between lead_preprocessed_data and historical_preprocessed_data

[Tims777]

There is an issue in naming between lead_preprocessed_data and historical_preprocessed_data. We must distinguish between both. Currently the code only names the output as preprocessed_data without any distinction.

Acceptance Criteria

1. "data preprocessing" step can be applied on both lead and historical data but will use a different output file name for each case
2. Training uses only historical data
3. Merchant Size Prediction should use lead_preprocessed_data for prediction

All the previous should work with both DB types: Local and S3